Ocena in vitro właściwości materiałowych Biodentine w porównaniu z ProRoot MTA
The difference in radiopacity between Biodentine and ProRoot MTA may be explained by the use of different radiopacifieres. Whereas ProRoot MTA contains about 2 at% bismuth [1, 2], 5% of zirconium oxide (ZrO2) is added to Biodentine as radiopacifier (according to manufacturer’s information). Under the aspect of biocompatibility zirconium oxide seems to be superior compared to bismuth oxide [60], but obviously the amount seems to be insufficient in Biodentine. A radiopacity value of about 1.5 mm Al for Biodentine is too low for clinical use and should thus be improved.
Setting time
The initial setting time according to the manufacturer of Biodentine is about 12 min. In the present study, the final setting time of Biodentine was 85.66 (± 6.03) min and thus sevenfold longer. Grech et al. evaluated the setting time of Biodentine to be 45 min according to ISO 9917–1:2007 [54]. The difference in the determined setting time may be explained by the different ISO standards used. Nevertheless, in both studies the setting time for Biodentine was significantly longer than the initial setting time given in the instructions of the manufacturer and should be taken into consideration when using this cement.
In the present study, the setting time of MTA was 228.33 (± 2.88) min, whereas other studies reported setting times for ProRoot MTA between 165 (± 5) min [15] and 170 (± 2) min [...]
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